______ important thing in life is to have a great aim, and ______ determination to attain it.
| A．An ; 不填 | B．A ; the | C．The ; the | D．The ; 不填 |
—I hear that you will be on travel again.
—Yeah. My boss __________ for me to discuss business details with someone from another company.
| A．asked | B．arranged | C．sent | D．called |
Not until the early years of the 19th century ________ what heat was.
| A．man did know | B．did man knew | C．didn't man know | D．did man know |
__________cleaning the yard and making up the beds for the old，we also read newspapers for them and had chats with them.
| A．Except for | B．Rather than | C．Apart from | D．Instead of |
The more one is ______ the English－speaking environment，the better he or she will learn the language.
| A．exposed to | B．filled in | C．caught on | D．kept up |
—Would you mind answering some questions on shopping habits?
—_______.
| A．Yes, with great pleasure |
| B．No, I am afraid I can't make it |
| C．Yes, it is worth the time |
| D．No, as long as it doesn't take long |